From Equip for Equality: (click for full article)
AT can be high-tech or low-tech, expensive or not, medical or non-medical in nature. Simply put, AT is a tool that can assist people with disabilities to improve functional capacities and quality of life. AT can come into play in various contexts including special education, vocational rehabilitation, employment, health coverage, and access to businesses and government services.
AT is broadly defined by federal law. "Assistive technology" means technology designed to be utilized in an assistive technology device or assistive technology service. An assistive technology device means any item, piece of equipment, or product system, whether acquired commercially, modified, or customized, that is used to increase, maintain, or improve functional capabilities of individuals with disabilities.